Which centre stimulates dorsal respiratory group neurons and controls the depth of inspiration?

1. The apneustic centre is a double cluster of neuronal cell bodies in the pons. 2. It stimulates neurons in the dorsal respiratory group. 3. By doing so it controls the depth of inspiration, particularly for deep breathing. 4. So the second option is correct. 5. The pneumotaxic centre inhibits the same target and governs rate rather than depth, which is the trap in the first option. 6. Cortical areas control voluntary breathing, so they set conscious acts rather than the depth of an ordinary breath. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.3 The Process of Breathing_